由于正式版的iOS5出来了,所以我也试着去升级了。于是下载了最新的Xcode,才1.7G左右,比以往的安装包要小许多。
升级Xcode后,打开以前创建的工程, 运气好,一个错误都没有,程序也能正常跑起来。由于我程序中用了ASIHttpRequest这个库,让我发现了一个小问题,就是
ASIAuthenticationDialog这个内置对话框在网络有代理的情况下出现,然后无论点cancle或是login都不能dismiss。在4.3的SDK中完全没问题,在5.0的SDK中就会在Console中看到输出:
Unbalanced calls to begin/end appearance transitions for <ASIAutorotatingViewController:>
很明显示在sdk5中, 用这个库有问题,还有在停止调式的时候,程序会有异常产生。
于是很明显示是SDK5的变化影响了ASIHttpRequest的正常使用。于是我要fix这个问题,经过我研究发现,dismiss不起作用是由于UIViewController的parentViewController不再返回正确值了,返回的是nil,而在SDK5中被presentingViewController取代了。于是在ASIAuthenticationDialog.m中找到+(void)dismiss这个方法并修改为:
- + (void)dismiss
- {
- #if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_4_3
- UIViewController *theViewController = [sharedDialog presentingViewController];
- [theViewController dismissModalViewControllerAnimated:YES];
- #else
- UIViewController *theViewController = [sharedDialog parentViewController];
- [theViewController dismissModalViewControllerAnimated:YES];
- #endif
- }
- [[self presentingController] presentModalViewController:self animated:YES];
- UIViewController *theController = [self presentingController];
- #if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_4_3
- SEL theSelector = NSSelectorFromString(@“presentModalViewController:animated:”);
- NSInvocation *anInvocation = [NSInvocation invocationWithMethodSignature:[[theController class] instanceMethodSignatureForSelector:theSelector]];
- [anInvocation setSelector:theSelector];
- [anInvocation setTarget:theController];
- BOOL anim = YES;
- UIViewController *val = self;
- [anInvocation setArgument:&val atIndex:2];
- [anInvocation setArgument:&anim atIndex:3];
- [anInvocation performSelector:@selector(invoke) withObject:nil afterDelay:1];
- #else
- [theController presentModalViewController:self animated:YES];
- #endif